ABSTRACT
In this study, scanning electron microscopy (SEM) was used to evaluate the adaptation of the first apical file after preflaring in mesiobuccal (MB) and mesiolingual (ML) canals of mandibular molars considering the tactile sensibility as a reference. The mesial canals (n = 22) of human mandibular molar teeth were used, and the first instrument to bind to the working length was determined after preflaring and crown-down shaping. Digital images of the root apex were acquired and a single examiner determined the contact of the file with the walls using Image J software. The results showed that the file was in contact in 47.83 percent and 31.71 percent in the MB and ML canals, respectively. When the apexes are fused, the average was 40.03 percent. A descriptive analysis showed that the first apical file did not touch all dentin walls in any of the samples.
Subject(s)
Humans , Dental Pulp Cavity/anatomy & histology , Molar/anatomy & histology , Root Canal Preparation/instrumentation , Image Processing, Computer-Assisted , Microscopy, Electron, Scanning , Odontometry , Root Canal Preparation/methods , Tooth Apex/anatomy & histologyABSTRACT
Introduction: Internal root resorption is a chronic inflammatoryprocess initiated within the pulp space with the loss of dentin. Theclastic cells present in the pulp tissue trigger a progressive resorptionphenomenon. Case report and conclusion: This paper reports aclinical case of an internal root resorption in the permanent centralincisor, at the middle third of the root canal. Because it is asymptomatic,internal root resorption needs an early diagnosis in order to institutethe endodontic treatment before the process compromises themineralized structures of the tooth.
ABSTRACT
Internal root resorptions are usually non-symptomatic and are discovered occasionally throughperiapical radiographs, revealing a very defined and regular outline. These resorptions are progressive,and eventually perforate the periodontium. The present work describes the treatment of a clinicalcase of internal root resorption with periodontal communication, outlining the interrelation betweenperiodontal surgery and endodontic therapy.
As reabsorções internas são normalmente assintomáticas e descobertas ocasionalmente atravésde radiografias periapicais, onde revelam um contorno bem definido e regular. Estasreabsorções são progressivas e eventualmente perfuram o periodonto. O presente trabalhodescreve o tratamento de um caso clínico de reabsorção radicular interna com comunicaçãoperiodontal onde se fizeram necessárias a inter-relação entre a cirurgia periodontal e a terapiaendodôntica convencional.